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Fri, 15 Aug 2025 14:06:20 +0200 (CEST) Received: from mail.pickering.cz (localhost [127.0.0.1]) by mail.pickering.cz (Postfix) with ESMTP id C90771AC5F7D for ; Fri, 15 Aug 2025 14:06:20 +0200 (CEST) Date: Fri, 15 Aug 2025 14:06:20 +0200 (CEST) From: Henryk Paluch To: freebsd-current@FreeBSD.org Message-ID: <595365288.15536127.1755259580702.JavaMail.zimbra@pickering.cz> Subject: sshd-session (sshd on conect) crashes with signal 6 List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Thread-Index: 6ROEIZdLF1e7MnnaVY0QpCuGPOSbFg== Thread-Topic: sshd-session (sshd on conect) crashes with signal 6 X-Spamd-Result: default: False [-4.00 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; DMARC_POLICY_ALLOW(-0.50)[pickering.cz,quarantine]; R_DKIM_ALLOW(-0.20)[pickering.cz:s=pmg.pickering.cz,pickering.cz:s=001B6668-20D8-11EE-95F6-B514B69B4328]; R_SPF_ALLOW(-0.20)[+mx:c]; MIME_GOOD(-0.10)[text/plain]; RCVD_COUNT_SEVEN(0.00)[7]; ASN(0.00)[asn:41046, ipnet:81.200.56.0/21, country:CZ]; MISSING_XM_UA(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; RECEIVED_HELO_LOCALHOST(0.00)[]; MLMMJ_DEST(0.00)[freebsd-current@FreeBSD.org]; RCPT_COUNT_ONE(0.00)[1]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_LAST(0.00)[]; DKIM_TRACE(0.00)[pickering.cz:+] X-Rspamd-Queue-Id: 4c3LTD2DFxz3cyS X-Spamd-Bar: --- Hello! After one week following current I recently started experiencing sshd-session crashes on 2 machines running latest 15.0-PRERELEASE (git Main branch). Anytime I try to SSH login to my 15.0-PRERELASE, sshd crashes on sshd-sesson subprocess with: pid 1217 (sshd-session), jid 0, uid 0: exited on signal 6 More details: gdb /usr/libexec/sshd-session /sshd-session.core Core was generated by `sshd-session: ansible [priv]'. Program terminated with signal SIGABRT, Aborted. Sent by thr_kill() from pid 15843 and user 0. #0 thr_kill () at thr_kill.S:4 warning: Source file is more recent than executable. 4 RSYSCALL(thr_kill) (gdb) bt #0 thr_kill () at thr_kill.S:4 #1 0x000019ceda634fa4 in __raise (s=s@entry=6) at /usr/src/lib/libc/gen/raise.c:48 #2 0x000019ceda6e52a9 in abort () at /usr/src/lib/libc/stdlib/abort.c:61 #3 0x000019ceda617d51 in __assert (func=, file=, line=line@entry=134, failedexpr=) at /usr/src/lib/libc/gen/assert.c:47 #4 0x000019c6b21029c3 in temporarily_use_uid (pw=pw@entry=0x3c3261215280) at /usr/src/crypto/openssh/uidswap.c:134 #5 0x000019c6b20e8517 in user_key_allowed2 (pw=0x3c3261215280, key=0x3c32612e5820, file=0x3c3261233e30 "/home/ansible/.ssh/authorized_keys", remote_ip=0x3c3261212da0 "192.168.122.1", remote_host=0x3c3261212dd0 "192.168.122.1", authoptsp=0x19ced2ed0590) at /usr/src/crypto/openssh/auth2-pubkey.c:599 #6 user_key_allowed (ssh=ssh@entry=0x3c32612f4000, pw=0x3c3261215280, key=0x3c32612e5820, auth_attempt=, authoptsp=authoptsp@entry=0x19ced2ed0688) at /usr/src/crypto/openssh/auth2-pubkey.c:783 #7 0x000019c6b20ed99d in mm_answer_keyallowed (ssh=0x3c32612f4000, sock=7, m=0x3c3261214d40) at /usr/src/crypto/openssh/monitor.c:1205 #8 0x000019c6b20f034d in monitor_read (ssh=ssh@entry=0x3c32612f4000, pmonitor=pmonitor@entry=0x3c32612c4cc0, ent=0x19c6b210a720 , pent=pent@entry=0x19ced2ed0758) at /usr/src/crypto/openssh/monitor.c:523 #9 0x000019c6b20efdf2 in monitor_child_preauth (ssh=ssh@entry=0x3c32612f4000, pmonitor=0x3c32612c4cc0) at /usr/src/crypto/openssh/monitor.c:298 #10 0x000019c6b20cac27 in privsep_preauth (ssh=ssh@entry=0x3c32612f4000) at /usr/src/crypto/openssh/sshd-session.c:353 #11 0x000019c6b20c9e3b in main (ac=2, av=) at /usr/src/crypto/openssh/sshd-session.c:1322 (gdb) q Encountered on 2 machines: Machine 1 "fbsd-next": uname -v -> FreeBSD 15.0-PRERELEASE #1 main-n279622-c992ac621327: Fri Aug 15 12:55:01 CEST 2025 root@fbsd-next:/usr/obj/usr/src/amd64.amd64/sys/GENERIC freebsd-version -> 15.0-PRERELEASE uname -UK -> 1500060 1500060 git branch -v -> * main c992ac621327 ipheth(4): Add CDC-NCM support for RX git describe -> vendor/NetBSD/bmake/20250804-302114-gc992ac621327 (Machine 2 is currently rebuilding): git branch -v -> * main 5205b32de3fb libc: Drop incorrect qsort optimization git describe -> vendor/NetBSD/bmake/20250804-302115-g5205b32de3fb Is anybody else experiencing same problem? Best regards --Henryk Paluch